This book introduces sonar system and acoustic channel model, average energy channel, coherent multipath channel, the theoretical basis for the stochastic time-varying space-variant channel, slowly time-varying coherent multipath channel, and reverberation channel. Based on the basic theory of underwater acoustic channels and the various characteristics of the marine acoustic environment factor, this textbook aims to help students understand the impact of the marine acoustic channel on the sonar system. It helps students to grasp underwater acoustic signal processing principles and obtain the ability to solve practical problems in underwater acoustic channel engineering. Finally, it aims at laying a foundation for the further sonar system design. This textbook is recommended for graduate or undergraduate students in the field of sonar signal processing, underwater acoustic engineering, as well as some related subjects of marine technology.

Originating from the 3rd Conference on Coastal Cities, the papers contained in this volume presents important research covering the integrated management and sustainable development of coastal cities. An increased world population and the preference for living in coastal regions increases the need for improved resources, infrastructure and services. Coastal cities should be considered as dynamic complex systems which need energy, water, food and other resources in order to work and produce diverse activities, with the aim of offering a socioeconomic climate and improved quality of life. Consequently the integrated management and sustainable development of coastal cities is essential with science, technology, architecture, socio-economics and planning all collaborating to support decision makers. Planners need to explore various options and models to forecast future services, plans and solutions. Included papers examine some of these possible models and potential solutions with emphasis in the areas of: Landscape and urban planning; Infrastructures and eco-architecture; City heritage and regeneration; Urban transport and communications; Commercial ports; Fishing and sports harbours; City-Waterfront interaction; Marine industries; Water resources management; Quality of life and city leisure; Tourism and the city; Water pollution; Air pollution; City waste management; Acoustical and thermal pollution; Coastal risk assessment; Coastal flooding; Coastal processes; Landslides; Socio-economic issues.